‰ NOW 30 WPM ‰ TEXT IS FROM MARCH 2009 QST PAGES 89, 90 AND 81 ‰
THE SDR 5000 AND THE K3, HAVE ESSENTIALLY EVERYTHING A GOOD IF RADIO NEEDS.
THE TS 850S LACKS MANY OF THESE REFINEMENTS BUT IT HAS ENOUGH OF THE BASICS
TO BE A REASONABLE CHOICE ESPECIALLY FOR THOSE ON A RELATIVELY LOW BUDGET.
THESE RADIOS REPRESENT THREE QUITE DIFFERENT DESIGN APPROACHES. THE TS
850S DESIGN IS NOW ALMOST 20 YEARS OLD USING WHAT WAS THEN A TYPICAL DOUBLE
CONVERSION IF 8R83 MHZ COUPLED WITH 455 KHZ. WITH 8 POLE INRAD FILTERS
AVAILABLE IN USEFUL BANDWIDTHS FOR BOTH SSB AND CW, FOR BOTH IFS, THIS
RADIO CAN BE BROUGHT UP TO RELATIVELY MODERN STANDARDS. BETTER YET AS THE
ORIGINAL REVIEW NOTES, IT HAS VERY LOW SYNTHESIZER ARTIFACTS. SYNTHESIZER
NOISE NOT ONLY MAKES YOU A BAD NEIGHBOR BY GENERATING UNWANTED BAND NOISE
FAR FROM YOUR FREQUENCY BUT RECIPROCALLY CAUSES WEAK SIGNALS TO BE BURIED
IN THAT NOISE. THE SDR 5000 IS WHAT I CALL A PURE SOFTWARE DEFINED RADIO
SDR. ESSENTIALLY ALL ITS HARDWARE SERVES TO INTERFACE WITH ITS SOFTWARE
THE FLEX RADIO POWER SDR. THIS IS A DIRECT DIGITAL SYNTHESIS DDS RADIO
‰ FROM PAGE 81 ‰
KA1CQR 12 B A N2QT 348,968 B B KB8UUZ 33,916 B B ND0C 36,698 B A KW7N 8,704
B B KB2JYZ 4 B A K4AB 268,288 B B W8KNO 26,455 B B KD0AWW 44 B A WK7P 7,112
‰ END OF 30 WPM TEXT ‰ QST DE W1AW ƒ